Electronic device and operation method thereof

Abstract

This electronic device may comprise a power conversion circuit and a load for receiving power from the power conversion circuit. The power conversion circuit can include: a converter including an inductor, a first switch, and a second switch; a charge pump including a third switch, a fourth switch, a first capacitor, a fifth switch, and a sixth switch; a second capacitor; a first active dummy load connected in parallel to the second capacitor; a third capacitor; and a second active dummy load connected in parallel to the third capacitor. Various other embodiments are possible.

Description

Electronic device and method of operation thereof

[0001] The present disclosure relates to an electronic device and a method of operating the same according to one embodiment.

[0002] The circuit responsible for emitting light in the OLED driver may include a light-emitting diode (LED) that emits light when current flows, and a switch (e.g., a field effect transistor (FET)) that controls the current flowing to the LED. Since the gate voltage for controlling the current flowing to the FET is very sensitive, the voltage can be formed with reference to the ground rather than a floating state. For example, in a state where the top of the light-emitting diode (e.g., the first terminal, the anode terminal, or anode) is connected to the bottom of the FET (e.g., the second terminal, the source terminal, or source), the bottom of the FET can be connected to the ground of the system. Therefore, if the voltage supplied to the top of the FET (e.g., the first terminal, the drain terminal, or drain) is VELVDD, and the voltage supplied to the bottom of the light-emitting diode (e.g., the first terminal, the cathode terminal, or cathode) is VELVSS, a power supply such that VELVDD>0 and VELVSS<0 is required. If the location of the light-emitting diode is placed on the top of the FET for current control (e.g., connecting the bottom or second terminal of the light-emitting diode to the top or drain terminal of the FET), a negative voltage is not required, but instead, since the voltage for driving the FET and the light-emitting diode is accumulated in series, there is a problem that a high voltage corresponding to the sum of the two voltages must be supplied. Therefore, except for some products, a structure is chosen that can avoid the high voltage issue by supplying positive and negative voltages based on the ground.

[0003] A switching regulator (or switching converter) is a circuit that converts DC (direct current) voltage into DC voltage. A buck converter is used for step-down, a boost converter for step-up, and a non-inverting buck-boost converter for both step-up and step-down.

[0004] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above-described matters constitute prior art related to the present disclosure.

[0005] According to one embodiment, an electronic device may include a power conversion circuit and a load configured to receive power from the power conversion circuit. The power conversion circuit may include a converter including an inductor, a first switch, and a second switch. The power conversion circuit may include a charge pump including a third switch, a fourth switch, a first capacitor, a fifth switch, and a sixth switch. The power conversion circuit may include a second capacitor, a first active dummy load connected in parallel with the second capacitor, a third capacitor, and a second active dummy load connected in parallel with the third capacitor.

[0006] According to one embodiment, a method of operating an electronic device may include controlling switches of a converter of the electronic device and switches of a charge pump connected in parallel with the converter. The converter may include an inductor, a first switch, and a second switch. The charge pump may include a third switch, a fourth switch, a first capacitor, a fifth switch, and a sixth switch. The method may include controlling a first active dummy load connected in parallel with a second capacitor of the electronic device, or controlling a second active dummy load connected in parallel with a third capacitor of the electronic device.

[0007] According to one embodiment, a computer-readable recording medium storing instructions configured to cause a controller of an electronic device to perform at least one operation may include controlling switches of a converter of the electronic device and switches of a charge pump connected in parallel with the converter. The converter may include an inductor, a first switch, and a second switch. The charge pump may include a third switch, a fourth switch, a first capacitor, a fifth switch, and a sixth switch. The at least one operation may include controlling a first active dummy load connected in parallel with a second capacitor of the electronic device, or controlling a second active dummy load connected in parallel with a third capacitor of the electronic device.

[0008] FIG. 1 is a block diagram of an electronic device within a network environment, according to one embodiment.

[0009] FIG. 2 is a block diagram of an electronic device according to one embodiment.

[0010] FIG. 3 is a circuit diagram of an electronic device according to one embodiment.

[0011] FIG. 4 is a circuit diagram of an active dummy load of an electronic device according to one embodiment.

[0012] FIG. 5 is a circuit diagram of a load of an electronic device according to one embodiment.

[0013] FIG. 6 is a diagram of an electronic device according to one embodiment.

[0014] FIG. 7 is a flowchart of a method of operating an electronic device according to one embodiment.

[0015] FIG. 8 is a flowchart of a method of operating an electronic device according to one embodiment.

[0016] FIG. 9 is a flowchart of a method of operating an electronic device according to one embodiment.

[0017] FIG. 10 is a flowchart of a method of operating an electronic device according to one embodiment.

[0018] FIG. 1 is a block diagram of an electronic device within a network environment, according to one embodiment.

[0019] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0020] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0021] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0022] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0023] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0024] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0025] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0026] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0027] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0028] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0029] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0030] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0031] The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0032] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0033] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0034] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0035] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0036] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for realizing 1eMBB, a loss coverage (e.g., 164 dB or less) for realizing mMTC, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for realizing URLLC.

[0037] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas, for example, by the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device via the at least one selected antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0038] According to various embodiments, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0039] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0040] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0041] FIG. 2 is a block diagram of an electronic device according to one embodiment. FIG. 3 is a circuit diagram of an electronic device according to one embodiment. FIG. 4 is a circuit diagram of an active dummy load of an electronic device according to one embodiment. FIG. 5 is a circuit diagram of a load of an electronic device according to one embodiment.

[0042] According to one embodiment, the processor (120) of FIG. 1 of the electronic device (101) may be referred to as a processing means, a control means, or a controller (120). The operation of the electronic device (101) according to one embodiment may be controlled by the controller (120) of the electronic device (101) (e.g., the processor (120) of FIG. 1). The electronic device (101) performing a specific operation may be that the electronic device (101) or a component included in the electronic device (101) is controlled by the controller (120) of the electronic device (101). The electronic device (101) may include one or more controllers (120), and for the convenience of explanation, in the following, even when a plurality of controllers (120) are implemented, the term “operation of the electronic device (101)” or “operation of the controller (120)” will be described.

[0043] Referring to FIG. 2, according to one embodiment, the electronic device (101) may include a power conversion circuit (210) (e.g., a power conversion means, a power conversion module, a power conversion unit, or a power conversion step (210)) and a load (220) (e.g., 340 of FIG. 3). The power conversion circuit (210) may provide power to the load (220). The load (220) may receive power from the power conversion circuit (210). For example, the load (220) may include at least one of the components of the display module (160) of FIG. 1 (e.g., an organic light emitting diode (OLED) or an OLED driver), but this is merely an example, and the type of the load (220) is not limited. For example, referring to FIG. 5, the load (220) (e.g., 340 of FIGS. 3 and 5) may include a light emitting diode (510) and a switch (520). This switch and each switch mentioned hereinabove or hereafter in this specification may be, for example, a switch or switching device, a switch or switching element, a switch or switching component, or a switch or switching means. The switch (e.g., 520 and the switches (311, 312, 323, 324, 325, 326) disclosed hereafter) may include a transistor (e.g., a metal oxide semiconductor field effect transistor (MOSFET)). The load (220) (e.g., 340 of FIGS. 3 and 5) may include a storage capacitor (530) (e.g., Cstg). The storage capacitor (530) (e.g., Cstg) may be connected in parallel with (e.g., between) the gate and the source of the driving transistor (e.g., switch (520)). A storage capacitor (530) (e.g., Cstg) can store the voltage between the gate and source of a driving transistor (e.g., switch (520)) applied according to a control signal (e.g., a signal provided through node N3 of FIG. 5) for one frame time.A positive voltage (e.g., VELVDD in FIG. 3) may be provided to one end (e.g., a first end, a drain end, or a drain) (e.g., an N1 node) of a switch (520) (e.g., a transistor) of a load (220) (e.g., 340 in FIGS. 3 and 5). The other end (e.g., a second end, a source end, or a source) of the switch (520) (e.g., a transistor) may be connected to one end (e.g., a first end, an anode end, or anode) of a light-emitting diode (510) and ground. A negative voltage (e.g., VELVSS in FIG. 3) may be provided to the other end (e.g., a second end, a cathode end, or a cathode) (e.g., an N2 node) of the light-emitting diode (510). Referring to FIG. 3, a power conversion circuit (210) that provides power to a load (220) (e.g., 340 of FIGS. 3 and 5) will be described.

[0044] Referring to FIG. 3, according to one embodiment, the power conversion circuit (210) may include a converter (310) (e.g., a converter means, a conversion means, a converter module, a converter circuit, a converter sub-circuit, a converter section, or a converter stage (310)). The converter (310) may be configured to convert power provided from a power source (300) (e.g., a power supply or a power supply means, a power or supply module, a power or supply circuit, a power or supply sub-circuit, a power or supply section, or a power or supply stage). For example, the converter (310) may be a boost converter or a non-inverting buck-boost converter, but there is no limitation on the type of the converter (310). For example, the converter (310) may include an inductor (313), a first switch (311), and a second switch (312). The converter (310) may be configured to convert power provided from the power source (300) based on the operation (e.g., on / off) of the switches (311, 312). The electronic device (101) (e.g., the controller (120)) may convert power provided from the power source (300) by controlling the converter (310) (e.g., the switches (311, 312) of the converter (310). According to one embodiment, the electronic device (101) may include a capacitor (314) (e.g., a boost capacitor) (e.g., C4 of FIG. 3) connected in parallel with the converter (310) (e.g., connected between output terminals or output rails of the converter (310). According to one embodiment, the electronic device (101) may not include the capacitor (314) connected in parallel with the converter (310).

[0045] Referring to FIG. 3, according to one embodiment, an electronic device (101) (e.g., a power conversion circuit (210)) may include a charge pump (320) (e.g., a charge pump means, a charge pumping means, a charge pump module, a charge pump circuit, a charge pump subcircuit, a charge pump section, or a charge pump stage (320)). The charge pump (320) may be connected in parallel to the converter (310). The charge pump (320) may shift a bias from ground to VELVSS. The charge pump (320) may be a 1:1 charge pump (320), but there is no limitation on the type of the charge pump (320). For example, the charge pump (320) may include a third switch (323), a fourth switch (324), a first capacitor (321) (e.g., a fly capacitor), a fifth switch (325), and a sixth switch (326). The charge pump (320) may store power provided from the converter (310) or a capacitor (314) (e.g., C4 of FIG. 3) connected in parallel to the converter (310) in the first capacitor (321) based on the operation (e.g., on / off) of the switches (323, 324, 325, 326). The charge pump (320) can output power through the fifth switch (325) and the sixth switch (326) based on the power stored in the first capacitor (321) based on the operation (e.g., on / off) of the switches (323, 324, 325, 326). For example, the power stored in the first capacitor (321) of the charge pump (320) can be provided to capacitors (e.g., 331, 341) connected to the rear end (e.g., output end) of the charge pump (320) (e.g., capacitors connected in series with each other between the output ends or output rails of the charge pump (320). The electronic device (101) (e.g., power conversion circuit (210)) can include the second capacitor (331) and the third capacitor (341).The second capacitor (331) and the third capacitor (341) can receive power stored in the first capacitor (321) based on the operation (e.g., on / off) of the switches (323, 324, 325, 326) of the charge pump (320). The third capacitor (341) can be connected to the second capacitor (331) and ground. For example, the second capacitor (331) can store power corresponding to a positive voltage (e.g., VELVDD of FIG. 3). The third capacitor (341) can store power corresponding to a negative voltage (e.g., VELVSS of FIG. 3). Power corresponding to a positive voltage (e.g., VELVDD in FIG. 3) stored in the second capacitor (331) can be provided to a first stage (e.g., a first terminal) (e.g., an N1 node) of a load (220) (e.g., 340 in FIGS. 3 and 5). Power corresponding to a negative voltage (e.g., VELVSS in FIG. 3) stored in the third capacitor (341) can be provided to a second stage (e.g., a second terminal) (e.g., an N2 node) of a load (220) (e.g., 340 in FIGS. 3 and 5). For example, node N1 may be described as a terminal or connection of a first power rail (e.g., a first power supply rail, a first rail, a positive power rail, a positive rail, or a high rail), and node N2 may be described as a terminal or connection of a second power rail (e.g., a second power supply rail, a second rail, a negative power rail, a negative rail, or a low rail), for example.

[0046] Referring to FIG. 3, according to one embodiment, the electronic device (101) (e.g., the power conversion circuit (210)) may include a first load (332) (e.g., a first active (i.e., controllable) load, or a first active dummy load (332)) connected in parallel to a second capacitor (331) (e.g., a shunt capacitor), and a second load (342) (e.g., a second active (i.e., controllable) load, or a second active dummy load (342)) connected in parallel to a third capacitor (341) (e.g., a shunt capacitor). The load (e.g., the active dummy load) (332 or 342) may be configured to control the voltage of the capacitor (331 or 341) connected in parallel. For example, the electronic device (101) (e.g., the controller (120)) can control the voltage of the capacitor (331 or 341) connected in parallel to the load (e.g., the active dummy load) (332 or 342) by controlling the load (e.g., the active dummy load) (332 or 342). For example, referring to FIG. 4, the first active dummy load (332) may include a resistor (411) and a switch (412). The second active dummy load (342) may include a resistor (421) and a switch (422). There is no limitation on the implementation manner of the first active dummy load (332) and the second active dummy load (342). For example, the first active dummy load (332) may include a circuit related to the operation of the resistor (411) and / or the switch (412). For example, the second active dummy load (342) may include circuitry associated with the operation of the resistor (421) and / or the switch (422). For example, the first active dummy load (332) may include circuitry that does not include the resistor (411) but produces an effect similar to that of the resistor (e.g., 411). For example, the first active dummy load (332) may include circuitry that does not include the switch (412) but produces an effect similar to that of the switch (412).For example, the second active dummy load (342) may include a circuit that does not include the resistor (421) but produces an effect similar to that of the resistor (e.g., 421). For example, the second active dummy load (342) may include a circuit that does not include the switch (422) but produces an effect similar to that of the switch (422). The operation of controlling the active dummy load (332 or 342) may include the operation of controlling the switch (412 or 422) of the active dummy load (332 or 342). For example, the electronic device (101) (e.g., the controller (120)) may control the voltage of the capacitor (331 or 341) connected in parallel to the active dummy load (332 or 342) by controlling the switch (412 or 422) of the active dummy load (332 or 342).

[0047] For example, each "active dummy load" described herein may be "active" in the sense of being controllable (and thus having, for example, at least one controllable or variable electrical characteristic and / or at least one controllable electrical element, component or device), may not be completely passive, and may be "dummy" in the sense of not being an actual load (or a final, destination, ultimate or actual load) that is powered by the power conversion circuitry (210), for example. In this context, the word "dummy" may be replaced with, for example, "virtual." Each active dummy load is part of the power conversion circuitry (210) itself and may be described as an internal load or an internally controllable load, for example.

[0048] Referring to FIG. 3, according to one embodiment, a first end of an inductor (313) of a converter (310) may be connected to a first end of a first switch (311) of a converter (310) and a first end of a second switch (312) of a converter (310). Throughout this specification, the term "end" may alternatively be replaced with the term "terminal," and thus the present disclosure includes disclosure of a subject matter corresponding to the entire text of this specification, but the term "end" may be replaced with "terminal." The second end of the inductor (313) may be connected to a power source (300). The second end of the first switch (311) of the converter (310) may be connected to a first end of a third switch (323) of a charge pump (320). The second terminal of the second switch (312) of the converter (310) can be connected to the first terminal of the fourth switch (324) of the charge pump (320) and ground. The second terminal of the third switch (323) of the charge pump (320) can be connected to the first terminal of the fifth switch (325) of the charge pump (320) and the first terminal of the first capacitor (321) of the charge pump (320). The second terminal of the fourth switch (324) of the charge pump (320) can be connected to the first terminal of the sixth switch (326) of the charge pump (320) and the second terminal of the first capacitor (321) of the charge pump (320). The second terminal of the fifth switch (325) of the charge pump (320) may be connected to the first terminal of the second capacitor (331) and the first terminal of the first active dummy load (332). The second terminal of the sixth switch (326) of the charge pump (320) may be connected to the first terminal of the third capacitor (341) and the first terminal of the second active dummy load (342). The second terminal of the second capacitor (331) may be connected to the second terminal of the first active dummy load (332), the second terminal of the second active dummy load (342), the second terminal of the third capacitor (341), and ground.A first terminal of the load (220; 340) may be connected to a first terminal of a second capacitor (331). A second terminal of the load (220; 340) may be connected to a first terminal of a third capacitor (341). A first terminal of the fourth capacitor (314) may be connected to a second terminal of a first switch (311) of the converter (310) and a first terminal of a third switch (323) of the charge pump (320). A second terminal of the fourth capacitor (314) may be connected to a second terminal of a second switch (312) of the converter (310) and a first terminal of a fourth switch (324) of the charge pump (320).

[0049] FIG. 6 is a diagram of an electronic device according to one embodiment.

[0050] Referring to FIG. 6, according to one embodiment, the electronic device (101) may be a wearable device (600). The description of the electronic device (101) of FIGS. 1, 2, 3, 4, and 5, and the electronic device (101) described below, may be applied to the wearable device (600) of FIG. 6. In FIG. 6, the electronic device (101) (e.g., the wearable device (600)) may include a housing (610), a display (660) (e.g., the display module (160) of FIG. 1), and a strap (620). The strap (620) may be configured to mount the electronic device (101) (e.g., the wearable device (600)) on a user's wrist. By supplying power to the load (220) (e.g., 340 of FIGS. 3 and 5) (e.g., OLED or OLED driver), a screen can be displayed on the display (660) (e.g., display module (160) of FIG. 1). In FIG. 6, the electronic device (101) (e.g., wearable device (600)) is disclosed as being a watch-shaped device, but this is merely an example, and the electronic device (101) (e.g., wearable device (600)) is not limited to a watch-shaped device. For example, the electronic device (101) may be a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device.

[0051] Fig. 7 is a flowchart of a method of operating an electronic device according to one embodiment. Fig. 7 can be explained with reference to the previously described embodiments and the embodiments described below.

[0052] At least some of the operations of FIG. 7 may be omitted. The order of the operations of FIG. 7 may be changed. Operations other than those of FIG. 7 may be performed before, during, or after the operations of FIG. 7.

[0053] Referring to FIG. 7, the synchronization operation of the switches (311, 312) of the converter (310) and the switches (323, 324, 325, 326) of the charge pump (320) can be described. For example, for a certain period of time, the third switch (323) and the fourth switch (324) of the charge pump (320) can be synchronized with the first switch (311) of the converter (310). For example, for a certain period of time, the fifth switch (325) and the sixth switch (326) of the charge pump (320) can be synchronized with the second switch (312) of the converter (310).

[0054] Referring to FIG. 7, in operation 701, according to one embodiment, the electronic device (101) (e.g., controller (120)) may control the first switch (311) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) to be turned on, and the second switch (312) of the converter (310), the fifth switch (325) of the charge pump (320), and the sixth switch (326) of the charge pump (320) may be turned off, during a first period. The electronic device (101) (e.g., controller (120)) may determine the first period in order to control the output (e.g., output voltage) of the converter (310).

[0055] In operation 703, according to one embodiment, the electronic device (101) (e.g., controller (120)) can control the second switch (312) of the converter (310), the fifth switch (325) of the charge pump (320), and the sixth switch (326) of the charge pump (320) to be turned on, and the first switch (311) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) can be turned off, during a second period. The electronic device (101) (e.g., controller (120)) can determine the second period to control the output (e.g., output voltage) of the converter (310).

[0056] In operation 705, according to one embodiment, the electronic device (101) (e.g., the controller (120)) can control the first switch (311) of the converter (310), the second switch (312) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) to be turned off, and the fifth switch (325) of the charge pump (320) and the sixth switch (326) of the charge pump (320) to be turned on, during a third period. The electronic device (101) (e.g., the controller (120)) can determine the third period to control the output (e.g., the output voltage) of the converter (310).

[0057] According to the synchronization operation of FIG. 7, the capacitance of the fourth capacitor (314) of FIG. 3 can be minimized or the fourth capacitor (314) can be eliminated. According to the synchronization operation of FIG. 7, the electronic device (101) may not include the fourth capacitor (314) of FIG. 3. The electronic device (101) may perform the operation of FIG. 7 without including the fourth capacitor (314) of FIG. 3. The input current of the converter (310) is continuously input, but the output current of the converter (310) is output only while the first switch (311) is on, and the output current of the converter (310) may be 0 while the second switch (312) is on. Accordingly, the electronic device (101) (e.g., controller (120)) can control the third switch (323) and the fourth switch (324) of the charge pump (320) to be turned on while the first switch (311) of the converter (310) is turned on. Accordingly, the first capacitor (321) also functions as a boost capacitor (e.g., the fourth capacitor (314)), and as a result, the fourth capacitor (314) may not be included in the electronic device (101). Alternatively, as the first capacitor (321) functions as a boost capacitor (e.g., the fourth capacitor (314)), the electronic device (101) may include the fourth capacitor (314) having a capacity that is reduced by the capacity (e.g., capacitance) of the first capacitor (321). The structure of the power conversion circuit (210) of FIG. 3 can improve power conversion efficiency compared to the existing method. The reason why the efficiency is improved in the proposed structure is as follows. In general, when two capacitors (e.g., a fly capacitor (e.g., the first capacitor (321)) and a boost capacitor (e.g., the fourth capacitor (314))) are connected in a switched capacitor structure such as a charge pump, current is transmitted by the potential difference and the resistance between the two voltage sources. As the voltage difference increases, the peak of the current increases and the current on the RMS scale increases, resulting in a structure in which conduction loss increases.Therefore, in order to increase the efficiency of the charge pump, the key is to increase the switching frequency to frequently transmit current so that the potential difference of the capacitor does not increase, or to increase the capacitance to prevent the potential difference from increasing. However, even if the conduction loss is reduced by increasing the switching frequency, the switching loss such as the gate driver loss of the switch increases, and increasing the capacitance increases the price and area. However, in the structure of FIG. 3, even if the switching frequency is not increased or the capacitance is not increased, the third switch (323) and the fourth switch (324) of the charge pump (320) are controlled to turn on at the timing when the first switch (311) of the converter (310) is controlled to turn on, so that the loss that occurs when the voltage sources meet is eliminated, and the structure becomes one in which the current source and the voltage source meet, so that only the general conduction loss remains, so that the efficiency can be increased compared to the existing method. In addition, in the conventional method, when current enters the boost capacitor (e.g., the fourth capacitor (314)) and is then transferred to the fly capacitor (e.g., the first capacitor (321)), loss due to the equivalent series resistance inside the boost capacitor (e.g., the fourth capacitor (314)) is added. However, if the boost capacitor (e.g., the fourth capacitor (314)) is removed in the structure of FIG. 3, the loss itself disappears, so that efficiency can be increased.

[0058] The operation of Fig. 7 will be described in detail with reference to Fig. 8.

[0059] Fig. 8 is a flowchart of a method of operating an electronic device according to one embodiment. Fig. 8 can be explained with reference to the previously described embodiments and the embodiments described below.

[0060] At least some of the operations of FIG. 8 may be omitted. The order of the operations of FIG. 8 may be changed. Operations other than those of FIG. 8 may be performed before, during, or after the operations of FIG. 8.

[0061] Referring to FIG. 8, in operation 801, according to one embodiment, the electronic device (101) (e.g., controller (120)) may set a target output voltage of the converter (310). Setting the target output voltage of the converter (310) may include setting a new target output voltage of the converter (310) or maintaining an existing target output voltage of the converter (310). The target output voltage of the converter (310) may be a target value of an output voltage output from the converter (310). If the target output voltage of the converter (310) is 0, the operation of the converter (310) may be stopped. For example, if the target output voltage of the converter (310) is set to 0 in operation 801, operation 803 may not be performed. If the target output voltage of the converter (310) exceeds 0, the converter (310) may be executed (e.g., operation 803). The target output voltage of the converter (310) can be determined based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341). The electronic device (101) (e.g., the controller (120)) can control the output of the converter (310) based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341). For example, the electronic device (101) (e.g., the controller (120)) can control the output of the converter (310) so that the output voltage of the converter (310) corresponds to the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341).For example, the electronic device (101) (e.g., controller (120)) may set the first period, the second period, and the third period of FIG. 7 so that the output voltage of the converter (310) corresponds to the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341).

[0062] In operation 803, according to one embodiment, the electronic device (101) (e.g., the controller (120)) may execute the converter (310). The execution of the converter (310) may be the performance of an operation that controls the on / off of switches (311, 312) of the converter (310) (e.g., controls, changes, or switches the states). For example, a switch in an “on” state may be conductive (i.e., provides a conductive path between (or connected to) the first and second terminals), and a switch in an “off” state may be, for example, non-conductive (i.e., does not provide a conductive path between the first and second terminals). For example, the “on” and “off” states may be described as “closed” and “open” states, respectively. The execution of the converter (310) may include initiating an operation of the converter (310), changing an operation of the converter (310), or maintaining an operation of the converter (310). The start of the operation of the converter (310) may be by applying a PWM (pulse width modulation) control signal to the switches (311, 312) of the converter (310). The change of the operation of the converter (310) may be by changing the PWM control signal applied to the switches (311, 312) of the converter (310). The electronic device (101) (e.g., controller (120)) may execute the converter (310) based on the target output voltage of the converter (310) set in operation 801.

[0063] In operation 805, according to one embodiment, the electronic device (101) (e.g., controller (120)) may determine that the first switch (311) of the converter (310) should be controlled to be turned on. For example, during the first period of operation 701 of FIG. 7, the electronic device (101) (e.g., controller (120)) may determine that the first switch (311) of the converter (310) should be controlled to be turned on. In operation 807, according to one embodiment, the electronic device (101) (e.g., the controller (120)) can control the first switch (311) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) to be turned on, and the second switch (312) of the converter (310), the fifth switch (325) of the charge pump (320), and the sixth switch (326) of the charge pump (320) to be turned off, during a first period.

[0064] In operation 809, according to one embodiment, the electronic device (101) (e.g., controller (120)) may determine that the second switch (312) of the converter (310) should be controlled to turn on. For example, during the second period of operation 703 of FIG. 7, the electronic device (101) (e.g., controller (120)) may determine that the second switch (312) of the converter (310) should be controlled to turn on. In operation 811, according to one embodiment, the electronic device (101) (e.g., controller (120)) can control the second switch (312) of the converter (310), the fifth switch (325) of the charge pump (320), and the sixth switch (326) of the charge pump (320) to be turned on, and the first switch (311) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) to be turned off, during the second period.

[0065] In operation 813, according to one embodiment, the electronic device (101) (e.g., controller (120)) may determine that the first switch (311) and the second switch (312) of the converter (310) should be controlled to turn off. For example, during the third period of operation 705 of FIG. 7, the electronic device (101) (e.g., controller (120)) may determine that the first switch (311) and the second switch (312) of the converter (310) should be controlled to turn off. In operation 815, according to one embodiment, the electronic device (101) (e.g., the controller (120)) can control the first switch (311) of the converter (310), the second switch (312) of the converter (310), the third switch (323) of the charge pump (320), and the fourth switch (324) of the charge pump (320) to be turned off, and control the fifth switch (325) of the charge pump (320) and the sixth switch (326) of the charge pump (320) to be turned on, during a third period.

[0066] The operations of FIGS. 7 and 8 may be performed simultaneously or separately from the operations of FIGS. 9 and 10 described below.

[0067] FIG. 9 is a flowchart of a method of operating an electronic device according to one embodiment. FIG. 10 is a flowchart of a method of operating an electronic device according to one embodiment. FIGS. 9 and 10 can be described with reference to the previously described embodiments and the embodiments described below.

[0068] Referring to FIGS. 9 and 10, the operation of the active dummy load (e.g., 332, 342) can be described. The operations of FIGS. 9 and 10 can be performed simultaneously with or separately from the operations of FIGS. 7 and 8 described above.

[0069] At least some of the operations of FIG. 9 may be omitted. The order of the operations of FIG. 9 may be changed. Operations other than those of FIG. 9 may be performed before, during, or after the operations of FIG. 9.

[0070] The operations of FIG. 9 may be performed simultaneously or separately from the operations of FIGS. 7 and 8.

[0071] Referring to FIG. 9, in operation 901, according to one embodiment, the electronic device (101) (e.g., controller (120)) can check the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3).

[0072] In operation 903, according to one embodiment, the electronic device (101) (e.g., the controller (120)) may compare the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3) with a first target voltage. The first target voltage may be a target value of a voltage corresponding to the second capacitor (331). The first target voltage may be a target value of a voltage to be provided to a first terminal (e.g., node N1) of a switch (520) of a load (220) (e.g., 340 of FIGS. 3 and 5). The first target voltage may be a positive voltage.

[0073] In operation 905, according to one embodiment, the electronic device (101) (e.g., the controller (120)) may control the first active dummy load (332) to turn on based on the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3) being greater than the first target voltage (e.g., a positive voltage). For example, the electronic device (101) (e.g., the controller (120)) may control the switch (e.g., 412) of the first active dummy load (332) to turn on based on the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3) being greater than the first target voltage. As the first active dummy load (332) is controlled to turn on, the voltage (e.g., VELVDD of FIG. 3) (e.g., a positive voltage) of the second capacitor (331) connected in parallel to the first active dummy load (332) may decrease. A decrease in voltage, which is a positive voltage, can be a decrease in the absolute value of the voltage.

[0074] In operation 907, according to one embodiment, the electronic device (101) (e.g., the controller (120)) can control the first active dummy load (332) to turn off based on whether the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3) is less than or equal to the first target voltage (e.g., a positive voltage). For example, the electronic device (101) (e.g., the controller (120)) can control the switch (e.g., 412) of the first active dummy load (332) to turn off based on whether the voltage of the second capacitor (331) (e.g., VELVDD of FIG. 3) is less than or equal to the first target voltage.

[0075] At least some of the operations of FIG. 10 may be omitted. The order of the operations of FIG. 10 may be changed. Operations other than those of FIG. 10 may be performed before, during, or after the operations of FIG. 10.

[0076] The operations of FIG. 10 may be performed simultaneously with or separately from the operations of FIG. 7 and FIG. 8.

[0077] Referring to FIG. 10, in operation 1001, according to one embodiment, the electronic device (101) (e.g., controller (120)) can check the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3).

[0078] In operation 1003, according to one embodiment, the electronic device (101) (e.g., the controller (120)) may compare the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3) with a second target voltage. The second target voltage may be a target value of a voltage corresponding to the third capacitor (341). The second target voltage may be a target value of a voltage to be provided to a first terminal (e.g., N2 node) of a light-emitting diode (510) of a load (220) (e.g., 340 of FIGS. 3 and 5). The second target voltage may be a negative voltage.

[0079] In operation 1005, according to one embodiment, the electronic device (101) (e.g., the controller (120)) may control the second active dummy load (342) to turn on based on the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3) being less than a second target voltage (e.g., a negative voltage). For example, the electronic device (101) (e.g., the controller (120)) may control the switch (e.g., 422) of the second active dummy load (342) to turn on based on the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3) being less than the second target voltage. As the second active dummy load (342) is controlled to turn on, the voltage (e.g., VELVSS of FIG. 3) (e.g., a negative voltage) of the third capacitor (341) connected in parallel to the second active dummy load (342) may increase. A negative voltage, which is an increase in voltage, may be a decrease in the absolute value of the voltage.

[0080] In operation 1007, according to one embodiment, the electronic device (101) (e.g., the controller (120)) can control the second active dummy load (342) to turn off based on the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3) being greater than or equal to the second target voltage (e.g., a negative voltage). For example, the electronic device (101) (e.g., the controller (120)) can control the switch (e.g., 422) of the second active dummy load (342) to turn off based on the voltage of the third capacitor (341) (e.g., VELVSS of FIG. 3) being greater than or equal to the second target voltage.

[0081] Those skilled in the art will appreciate that the embodiments described herein may be applied interchangeably, within the scope of their applicability. For example, those skilled in the art will appreciate that at least some operations of one embodiment described herein may be omitted and applied, or at least some operations of one embodiment may be applied in conjunction.

[0082] The technical tasks to be achieved in this document are not limited to the technical tasks mentioned above, and other technical tasks not mentioned will be clearly understood by those with ordinary skill in the technical field to which this document pertains from the description below.

[0083] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0084] With respect to the following paragraphs beginning with the phrase "According to one embodiment," it should be understood that features of any one paragraph may be combined with features of any other paragraph, or any combination of such paragraphs may be combined with corresponding effects(s) and / or advantages(es), except where such combination is clearly inconsistent or incompatible. In other words, this specification should be construed as an explicit disclosure of the subject matter of one or more combinations of the following paragraphs beginning with the phrase "According to one embodiment."

[0085] According to one embodiment, an electronic device (101; 600) may include a power conversion circuit (210) and a load (220; 340) configured to receive power from the power conversion circuit (210). The power conversion circuit (210) may include a converter (310) including an inductor (313), a first switch (311), and a second switch (312). The power conversion circuit (210) may include a charge pump (320) including a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326). The power conversion circuit (210) may include a second capacitor (331), a first active (e.g., controllable) load (332) (e.g., a first active dummy load (332)) connected in parallel with the second capacitor (331), a third capacitor (341), and a second active (e.g., controllable) load (342) (e.g., a second active dummy load (342)) connected in parallel with the third capacitor (341).

[0086] According to one embodiment, the first terminal of the inductor (313) may be connected to the first terminal of the first switch (311) and the first terminal of the second switch (312). The second terminal of the first switch (311) may be connected to the first terminal of the third switch (323). The second terminal of the second switch (312) may be connected to the first terminal of the fourth switch (324) and ground. The second terminal of the third switch (323) may be connected to the first terminal of the fifth switch (325) and the first terminal of the first capacitor (321). The second terminal of the fourth switch (324) may be connected to the first terminal of the sixth switch (326) and the second terminal of the first capacitor (321). The second terminal of the fifth switch (325) may be connected to the first terminal of the second capacitor (331) and the first terminal of the first active load (332) (e.g., the first active dummy load (332)). The second terminal of the sixth switch (326) may be connected to the first terminal of the third capacitor (341) and the first terminal of the second active load (342) (e.g., the second active dummy load (342)). The second terminal of the second capacitor (331) may be connected to the second terminal of the first active (e.g., dummy) load (332), the second terminal of the second active (e.g., dummy) load (342), the second terminal of the third capacitor (341), and ground. The first terminal of the load (220; 340) may be connected to the first terminal of the second capacitor (331). The second terminal of the load (220; 340) may be connected to the first terminal of the third capacitor (341).

[0087] According to one embodiment, the electronic device (101; 600) may include a fourth capacitor (314) connected in parallel with the converter (310) (e.g., between or across output terminals of the converter). A first terminal of the fourth capacitor (314) may be connected to the second terminal of the first switch (311) and the first terminal of the third switch (323). A second terminal of the fourth capacitor (314) may be connected to the second terminal of the second switch (312) and the first terminal of the fourth switch (324).

[0088] In one embodiment, the converter (310) may be a boost converter or a non-inverting buck-boost converter.

[0089] According to one embodiment, the electronic device (101; 600) may include a controller (120) (e.g., processor (120)). The controller (120) may be configured to control the first switch (311), the third switch (323), and the fourth switch (324) to be turned on, and to control the second switch (312), the fifth switch (325), and the sixth switch (326) to be turned off, during a first period. The controller (120) may be configured to control the second switch (312), the fifth switch (325), and the sixth switch (326) to be turned on, and to control the first switch (311), the third switch (323), and the fourth switch (324) to be turned off, during a second period. The controller (120) may be configured to control the first switch (311), the second switch (312), the third switch (323), and the fourth switch (324) to be off, and to control the fifth switch (325) and the sixth switch (326) to be on, during a third period.

[0090] According to one embodiment, the controller (120) may be configured to control the output of the converter (310) based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341).

[0091] In one embodiment, the controller (120) may be configured to control the first active (e.g., dummy) load (332) to turn on based on the first voltage of the second capacitor (331) being greater than the first target voltage. The controller (120) may be configured to control the second active (e.g., dummy) load (342) to turn on based on the second voltage of the third capacitor (341) being less than the second target voltage.

[0092] In one embodiment, the first active (e.g., dummy) load (332) may include a first resistor (411) and a seventh switch (412). The second active (e.g., dummy) load (342) may include a second resistor (421) and an eighth switch (422).

[0093] In one embodiment, the first voltage of the second capacitor (331) may be provided to the first terminal of the load (220; 340). The second voltage of the third capacitor (341) may be provided to the second terminal of the load (220; 340).

[0094] According to one embodiment, the load (220; 340) may include a light emitting diode (510) and a ninth switch (520).

[0095] According to one embodiment, the electronic device (101; 600) may include a strap (620) configured to mount the electronic device (101; 600) on a user's wrist.

[0096] According to one embodiment, a method of operating an electronic device (101; 600) may include controlling switches (311; 312) of a converter (310) of the electronic device (101; 600) and switches (323; 324; 325; 326) of a charge pump (320) connected in parallel to the converter (310). The converter (310) may include an inductor (313), a first switch (311), and a second switch (312). The charge pump (320) may include a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326). The method may include controlling a first active (e.g., dummy) load (332) connected in parallel with a second capacitor (331) of the electronic device (101; 600), or controlling a second active (e.g., dummy) load (342) connected in parallel with a third capacitor (341) of the electronic device (101; 600).

[0097] According to one embodiment, the operation of controlling the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of providing the voltage of the first capacitor (321) to the second capacitor (331) and the third capacitor (341) by controlling the fifth switch (325) and the sixth switch (326) to be on. A first terminal of the fifth switch (325) may be connected to a first terminal of the first capacitor (321). A first terminal of the sixth switch (326) may be connected to a second terminal of the first capacitor (321). A first terminal of the second capacitor (331) may be connected to a second terminal of the fifth switch (325). The first terminal of the third capacitor (341) may be connected to the second terminal of the sixth switch (326). The second terminal of the second capacitor (331) may be connected to the second terminal of the third capacitor (341) and ground.

[0098] According to one embodiment, the electronic device (101; 600) may include a fourth capacitor (314) connected in parallel to the converter (310).

[0099] According to one embodiment, the operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the first switch (311), the third switch (323), and the fourth switch (324) to be on, and controlling the second switch (312), the fifth switch (325), and the sixth switch (326) to be off, during a first period. The operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the second switch (312), the fifth switch (325), and the sixth switch (326) to be on, and controlling the first switch (311), the third switch (323), and the fourth switch (324) to be off, during a second period. The operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the first switch (311), the second switch (312), the third switch (323), and the fourth switch (324) to be off, and controlling the fifth switch (325) and the sixth switch (326) to be on, during a third period.

[0100] According to one embodiment, the operation of controlling the switches (311; 312) of the converter (310) may include an operation of controlling the output of the converter (310) based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341).

[0101] According to one embodiment, the operation of controlling the first active (e.g., dummy) load (332) or controlling the second active (e.g., dummy) load (342) comprises:

[0102] The operation may include controlling the first active (e.g., dummy) load (332) to turn on based on the first voltage of the second capacitor (331) being greater than the first target voltage. The operation of controlling the first active (e.g., dummy) load (332) or controlling the second active (e.g., dummy) load (342) may include controlling the second active (e.g., dummy) load (342) to turn on based on the second voltage of the third capacitor (341) being less than the second target voltage.

[0103] According to one embodiment, the first active (e.g., dummy) load (332) may include a first resistor (411) and a seventh switch (412). The second active (e.g., dummy) load (342) may include a second resistor (421) and an eighth switch (422). An operation of controlling the first active (e.g., dummy) load (332) may include an operation of controlling the seventh switch (412). An operation of controlling the second active (e.g., dummy) load (342) may include an operation of controlling the eighth switch (422).

[0104] According to one embodiment, a computer readable recording medium storing instructions configured to cause a controller (120) of an electronic device (101; 600) to perform at least one operation may include an operation of controlling switches (311; 312) of a converter (310) of the electronic device (101; 600) and switches (323; 324; 325; 326) of a charge pump (320) connected in parallel to the converter (310). The converter (310) may include an inductor (313), a first switch (311), and a second switch (312). The charge pump (320) may include a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326). The at least one operation may include controlling a first active (e.g., dummy) load (332) connected in parallel with a second capacitor (331) of the electronic device (101; 600), or controlling a second active (e.g., dummy) load (342) connected in parallel with a third capacitor (341) of the electronic device (101; 600).

[0105] According to one embodiment, the operation of controlling the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of providing the voltage of the first capacitor (321) to the second capacitor (331) and the third capacitor (341) by controlling the fifth switch (325) and the sixth switch (326) to be on. A first terminal of the fifth switch (325) may be connected to a first terminal of the first capacitor (321). A first terminal of the sixth switch (326) may be connected to a second terminal of the first capacitor (321). A first terminal of the second capacitor (331) may be connected to a second terminal of the fifth switch (325). The first terminal of the third capacitor (341) may be connected to the second terminal of the sixth switch (326). The second terminal of the second capacitor (331) may be connected to the second terminal of the third capacitor (341) and ground.

[0106] According to one embodiment, the electronic device (101; 600) may include a fourth capacitor (314) connected in parallel to the converter (310).

[0107] According to one embodiment, the operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the first switch (311), the third switch (323), and the fourth switch (324) to be on, and controlling the second switch (312), the fifth switch (325), and the sixth switch (326) to be off, during a first period. The operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the second switch (312), the fifth switch (325), and the sixth switch (326) to be on, and controlling the first switch (311), the third switch (323), and the fourth switch (324) to be off, during a second period. The operation of controlling the switches (311; 312) of the converter (310) and the switches (323; 324; 325; 326) of the charge pump (320) may include an operation of controlling the first switch (311), the second switch (312), the third switch (323), and the fourth switch (324) to be off, and controlling the fifth switch (325) and the sixth switch (326) to be on, during a third period.

[0108] According to one embodiment, the operation of controlling the switches (311; 312) of the converter (310) may include an operation of controlling the output of the converter (310) based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341).

[0109] According to one embodiment, the operation of controlling the first active (e.g., dummy) load (332) or controlling the second active (e.g., dummy) load (342) comprises:

[0110] The operation may include controlling the first active (e.g., dummy) load (332) to turn on based on the first voltage of the second capacitor (331) being greater than the first target voltage. The operation of controlling the first active (e.g., dummy) load (332) or controlling the second active (e.g., dummy) load (342) may include controlling the second active (e.g., dummy) load (342) to turn on based on the second voltage of the third capacitor (341) being less than the second target voltage.

[0111] According to one embodiment, the first active (e.g., dummy) load (332) may include a first resistor (411) and a seventh switch (412). The second active (e.g., dummy) load (342) may include a second resistor (421) and an eighth switch (422). An operation of controlling the first active (e.g., dummy) load (332) may include an operation of controlling the seventh switch (412). An operation of controlling the second active (e.g., dummy) load (342) may include an operation of controlling the eighth switch (422).

[0112] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0113] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0114] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0115] Various embodiments of the present document may be implemented as software (e.g., a program) including one or more instructions stored on a storage medium that can be read by a machine (e.g., an electronic device). For example, a processor (e.g., a controller) of the machine may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0116] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0117] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In an electronic device (101; 600), Power conversion circuit (210); and It includes a load (220) configured to receive power from the power conversion circuit (210), The above power conversion circuit (210) A converter (310) including an inductor (313), a first switch (311), and a second switch (312); A charge pump (320) including a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326); Second capacitor (331); A first active dummy load (332) connected in parallel with the second capacitor (331); a third capacitor (341); and Including a second active dummy load (342) connected in parallel with the third capacitor (341). Electronic devices (101; 600).

2. In paragraph 1, The first terminal of the above inductor (313) is connected to the first terminal of the first switch (311) and the first terminal of the second switch (312). The second terminal of the first switch (311) is connected to the first terminal of the third switch (323), The second terminal of the second switch (312) is connected to the first terminal of the fourth switch (324) and ground, The second terminal of the third switch (323) is connected to the first terminal of the fifth switch (325) and the first terminal of the first capacitor (321). The second terminal of the fourth switch (324) is connected to the first terminal of the sixth switch (326) and the second terminal of the first capacitor (321). The second terminal of the fifth switch (325) is connected to the first terminal of the second capacitor (331) and the first terminal of the first active dummy load (332). The second terminal of the sixth switch (326) is connected to the first terminal of the third capacitor (341) and the first terminal of the second active dummy load (342). The second terminal of the second capacitor (331) is connected to the second terminal of the first active dummy load (332), the second terminal of the second active dummy load (342), the second terminal of the third capacitor (341), and ground. The first terminal of the above load (220) is connected to the first terminal of the second capacitor (331), The second end of the above load (220) is connected to the first end of the third capacitor (341). Electronic devices (101; 600).

3. In paragraph 1 or 2, It further includes a fourth capacitor (314) connected in parallel to the above converter (310), The first terminal of the fourth capacitor (314) is connected to the second terminal of the first switch (311) and the first terminal of the third switch (323). The second terminal of the fourth capacitor (314) is connected to the second terminal of the second switch (312) and the first terminal of the fourth switch (324). Electronic devices (101; 600).

4. In any one of paragraphs 1 to 3, The above converter (310) is a boost converter or a non-inverting buck-boost converter. Electronic devices (101; 600).

5. In any one of paragraphs 1 to 4, Further comprising a controller (120), The above controller (120) During the first period, the first switch (311), the third switch (323), and the fourth switch (324) are controlled to be on, and the second switch (312), the fifth switch (325), and the sixth switch (326) are controlled to be off. During the second period, the second switch (312), the fifth switch (325), and the sixth switch (326) are controlled to be on, and the first switch (311), the third switch (323), and the fourth switch (324) are controlled to be off. During the third period, the first switch (311), the second switch (312), the third switch (323), and the fourth switch (324) are controlled to be off, and the fifth switch (325) and the sixth switch (326) are controlled to be on. Electronic devices (101; 600).

6. In any one of paragraphs 1 to 5, Further comprising a controller (120), The above controller (120) It is configured to control the output of the converter (310) based on the sum of the absolute value of the first target voltage corresponding to the second capacitor (331) and the absolute value of the second target voltage corresponding to the third capacitor (341). Electronic devices (101; 600).

7. In any one of paragraphs 1 to 6, The above controller (120) Based on the first voltage of the second capacitor (331) being greater than the first target voltage, the first active dummy load (332) is controlled to be turned on, The second active dummy load (342) is configured to be turned on based on the second voltage of the third capacitor (341) being less than the second target voltage. Electronic devices (101; 600).

8. In any one of paragraphs 1 to 7, The above first active dummy load (332) includes a first resistor (411) and a seventh switch (412), The second active dummy load (342) includes a second resistor (421) and an eighth switch (422). Electronic devices (101; 600).

9. In any one of paragraphs 1 to 8, The first voltage of the second capacitor (331) is provided to the first terminal of the above load (220), The second voltage of the third capacitor (341) is provided to the second stage of the above load (220). Electronic devices (101; 600).

10. In any one of paragraphs 1 to 9, The above load (220) includes a light emitting diode (510) and a ninth switch (520). Electronic devices (101; 600).

11. In any one of paragraphs 1 to 10, Further comprising a strap (620) configured to mount the electronic device (101; 600) on the user's wrist; Electronic devices (101; 600).

12. In the operating method of an electronic device (101; 600), An operation of controlling switches (311; 312) of a converter (310) of the electronic device (101; 600) and switches (323; 324; 325; 326) of a charge pump (320) connected in parallel to the converter (310), wherein the converter (310) includes an inductor (313), a first switch (311), and a second switch (312), and the charge pump (320) includes a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326), An operation including controlling a first active dummy load (332) connected in parallel with a second capacitor (331) of the electronic device (101; 600), or controlling a second active dummy load (342) connected in parallel with a third capacitor (341) of the electronic device (101; 600). method.

13. In paragraph 12, The operation of controlling the switches (323; 324; 325; 326) of the charge pump (320) is as follows: By controlling the fifth switch (325) and the sixth switch (326) to be turned on, the voltage of the first capacitor (321) is provided to the second capacitor (331) and the third capacitor (341). The first terminal of the above fifth switch (325) is connected to the first terminal of the above first capacitor (321), The first terminal of the above sixth switch (326) is connected to the second terminal of the above first capacitor (321), The first terminal of the second capacitor (331) is connected to the second terminal of the fifth switch (325), The first terminal of the third capacitor (341) is connected to the second terminal of the sixth switch (326), The second terminal of the second capacitor (331) is connected to the second terminal of the third capacitor (341) and ground. method.

14. In clause 12 or 13, The above electronic device (101; 600) further includes a fourth capacitor (314) connected in parallel to the converter (310). method.

15. A computer readable recording medium storing instructions set to perform at least one operation by a controller (120) of an electronic device (101; 600), wherein the at least one operation is: An operation of controlling switches (311; 312) of a converter (310) of the electronic device (101; 600) and switches (323; 324; 325; 326) of a charge pump (320) connected in parallel to the converter (310), wherein the converter (310) includes an inductor (313), a first switch (311), and a second switch (312), and the charge pump (320) includes a third switch (323), a fourth switch (324), a first capacitor (321), a fifth switch (325), and a sixth switch (326), An operation including controlling a first active dummy load (332) connected in parallel with a second capacitor (331) of the electronic device (101; 600), or controlling a second active dummy load (342) connected in parallel with a third capacitor (341) of the electronic device (101; 600). Recording medium.

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